Life Cycle of Stars/HR Diagram with Notes

1. Pick up paper & get journal

2. Answer Do Now in Journal

3. Join quizizz

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Do Now:

​Thursday 10/24

A group of friends were discussing what happens at the end of a star's life.
Which do you agree with and why?

Get out yesterday's paper!

​Check your answers on yesterday's paper!

Multiple Choice

Our sun is currently in the _________ life phase.

• red giant

• main sequence

• red supergiant

• neutron star

Multiple Choice

Our sun's last phase of life will be as a ?

• Black Hole

• Neutron Star

• White Dwarf

• Red Giant

Use the quizizz to complete the note paper!

​Life Cycle of a LOW mass star

​Life Cycle of a HIGH mass star

Multiple Choice

Stars are born in a ?

• Nebula

• Supernova

• Black Hole

Dropdown

Small-Medium main sequence stars become ​​

Select answer

while Large main sequence stars become ​

Select answer

Multiple Choice

What type of fuel do main sequence stars burn?

• Helium

• Hydrogen

• Oxygen

• Nitrogen

HR diagrams graph stars based on their luminosity (brightness), temperature, and spectral class.

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​HR Diagrams

Fill in the vocabulary

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HR Vocabulary

Multiple Choice

Use the HR Diagram. What is the luminosity of Betelgeuse?

• 10⁴

• 10²

• 3,000

• -6

Multiple Choice

Use the HR Diagram. What is the spectral class of RR Lyrae?

• 0

• G0

• 10

• F0

Multiple Choice

Use the HR Diagram. What is the magnitude of Regulus?

• 0

• 10

• 12,000

• A0

Multiple Choice

Use the HR Diagram. What is the temperature of Rigel?

• A0

• 10²

• -8

• 10,000

Multiple Choice

If I wanted to observe gamma rays, what kind of telescope would I need?

• Radio Telescope

• Infrared Telescope

• Gamma Telescope

• UV Telescope

Check that your paper matches!

Multiple Choice

Where are stars formed?

• In the atmosphere

• In black holes
• Stars are formed in nebulas.

• In the cores of planets

Multiple Choice

What happens to main sequence stars when they run out of fuel?

• They remain unchanged and continue to shine forever.
• They expand and cool down becoming red giants/supergiants

• They explode as supernovae immediately.
• They shrink into black holes without any change.

Multiple Choice

What force pulls the nebula together to form a star?

• Magnetism
• Electromagnetism
• Nuclear force
• Gravity

Multiple Choice

The leftover gas and dust from a supernova can form a what?

• pulsar
• quasar
• black hole
• nebula

Multiple Choice

What force holds a galaxy together?

• Gravity
• Friction
• Nuclear force
• Electromagnetism

Check your paper matches!

​Check that your paper is filled out complete and glue into journal.